How can I guarantee that a user’s Facebook account has been successfully logged off from my own app? (ios)

Question

我目前在我的应用程序中遇到一个错误，即使我已经在我的应用程序中注销了该帐户，我的 Facebook 仍会作为我的应用程序的默认帐户保持登录状态。

Answer 1

set CurrentAccessToken to nil. This should work.

[FBSDKAccessToken setCurrentAccessToken:nil] 

Answer 2

facebook sdk, you can check

if(FBSDKAccessToken.current() != nil) { //logged in } else { //not logged in }